Scraping apparatus



' Fel 13, 1940,-l J. H. 'KER'BER l scRAPING APPARATUS Fiied qun s', 193s5 sheets-sheet 1 INVENTOR ATTORNEY.

IFeb.. 13, 1940. J. H. KERBER I 2,190,452

FIG-.2,

` :scRPING APPARATUS Filed-'June 6, 1936 3 Sheets-Sheevt 2' .INVENTORATTORNEY 'MW-f@ v BY y Feb. 13, 1940. u .l-l. KERBER .2,190,4 52'- IscRAPING APPARATUS Filed 'June 6, i936 3 Sheets-'Sheet 3 n ATTORNEY l lsI I6 21 l y I l BY lPatented Feb. 13, 1940 UNITED STA-Tes PATENT .OFFICEscaAPmG APPARATUS Joseph H. Kerber, Milwaukee, Wis., -assignor lli-WayService Corporation, Milwaukee, WN

a corporation of Wisconsin Appuuonrune, s, 193s, serial No. 212,0211scisma (ci. .sv-144) 'Ihe invention relates t0 material-handlingapparatus and more particularly to.those forms of apparatus employingscraper blades such as used as bulldozers, backilllers, and snowplows.The main object of the invention is to provide aconstruction in whichthe scraper blade may lbe given a vertical angular adjustment throughoperating connections controlled by. the operator of the vehicle onwhich the scraper is mounted. Heretofore, any vertical angularadjustments have had to be made while the vehicle was standing still,while with the present invention the cutting angle maybe changed withoutgetting out of the machine and at any time which greatly facilitates thescraping of a road to any desired inclination. l

A further object of the inventionis to pro-4 vide a connection'for thescraper blade at spaced points which will shorten the over all length of'the machine.-

A further object of the invention is to provide an arrangement in .whichthe scraper is angularly adjustable relative to the direction oftravelfof the vehicle and may also be positioned at-right angles to saiddirection of travel.

vThe invention further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig.` l is a side elevation view of al tractor equipped with a scrapingapparatus embodying the invention; I

Fig. 2 is a plan view of the apparatus, parts being broken away andparts shown in section; Fig; 3 is a detailed vertical sectional view onthe line 3--3 of Fig. 2;

Fig. 4 is a detailed vertical sectional view through the line 4-4 ofFig. 2;` l

Fig. 5 is` a vertical sectional view taken on the line 5-5 of Flg. 1; Y

Fig. 6 is a diagrammatic view vof the apparatus with the scraper bladein one angulary position; Fig. 7 is a diagrammatic view of the apparatuswith the scraper blade in a straight position; Figs. 8 to l2 are viewsof the scraper in various positions of vertical adjustment;

Fig. 13 -is a detailed sectional viewon the line -ls-ls of Fig. 2.

In the drawings, the numeral I5 designates a tractor of knownconstruction of the full crawler typevhaving endless propelling treadsI6 running over sprockets I1 and I1', here shown conventionally at thefront and rear portions of the tractor and over the usual truck or treadrollers (not shown) mounted .in 'the truck or tread frames I8. Asisusual, the rear sprockers I1 are driven from the engine housed in thehousing I9 through a suitable transmission (not Shown) and under thecontrol of the operator or driver of the'tractor from his seat 20, thesecontrols not being specifically shown.

The truck frames I8 include frame members tov which pivot formingbrackets y2I are secured, said brackets having ball shaped pivot ends 22upon which the side frame members 24 of the implement orblade-supporting frame are pivotally mounted. This supporting framefurther ineludes frame members 25 which areadjustable lengthwiserelative to the members 24 land may also include a triangular framevmember 26 adapted to be secured to either of. the members 24. Thescraper blade or other implement member 21 is adapted to be connected tothe members 24, 25, and 26 by pin joints such as that shown ln Fig.' 4which includes the removable pin 28 adapted to be passed through holes29 and 30 in the scraper and frame member respectively, the holes 30being shown in Fig. 4 as having clearance to accommodate for ,thevertical angular adjustment of the blade.

Angled brackets 3| are secured to the truck frame parts 32 by bolts 33,and U-shaped lever members 34 straddle the front ends of the truckframes I8 and are pivotally connectedto each set of brackets by pivotbolts 35.

The side frame members 24 lpreferably carry plates 36 which cooperatewith similar plates 31 on the brackets 3i to keep the sides of thesupporting frame in proper alignment.

Each member 34 is operatively connected by' links 38 with itscooperative side 4frame member 24. l

Each of the supporting frames are independently operable through ahydraulically operated means including a hydraulically operated cylinder39 pivotally connected at its rear end upon 'the pivot pin 40 securedtothe frame of the tractor and having a piston working in said cylinder`with its rod 4I operatively connected to the member 34 by the pivot pin42. Each of the cylinders 39 is adapted to be supplied through pipeconnections 39 with fluid from a suitable source of pressure supplyandunder the action of a suitable control valve. I

With vthe above construction, movement of the rod 4I toward the leftswings the lever or memy ber` 34 upwardly, and this through the links 38acts to swing the 4frame members 24 upwardly and thus lift that end ofthe scraper blade to which the frame member 24 isconnected. Thusindependently adjustable, the vertical angularity of the blade may beadjusted to suit the requirements of the work.

A is

In order to adjust the' angle the blade Vmakes in a horizontal plane,the frame member 26 may be connected to either of the angled ends 43 ofthe side frame members 24 by removable pin connections 44, similar tothat shown in Fig. 4, One position being shown in Fig. 2 and the otherposition shown in Fig. 6. f

In either position of angular adjustment, the frame members 25 areconnected to the members 2d and 21 to act as braces, such connectionsbeing shown inv Fig. 6 where one of the braces 25 connects with theouter end of the member 24 and the outer end of the blade'and the otherconnects lthe outer end of the blade with the.

inner 'end-of the other member 24 by a remov- -able pin 2 8 passingthrough openings in the rear end of the memberv and the openings 29in-the memberv24. l

For the straight connection, the member 26 is omitted and the scraperblade connected directly to the ends of the frame members 24. Y

Under these conditions the blade is further braced by the `connection ofthe frame member 25 with the end of the blade and with the intermediatepart of theV member 24, as shown in Fig. 7. y V

With any'of the positions of angular adjustment in a horizontal plane,the connections for lifting the ends of the blade may be operatedtogether to lift the blade 21 vertically from its position shown inFig.- 8, or either end may be raised or lowered relatively to the otherto assume the different positions shown in Figs. 9 to 12 inclusive.l Theswivel or ball and socket joints provided between the pin ends 22 andthe sockets'i on the ends of'the levers 24 permit of the ready raising`and lowering of one end relative to the other.

t is to be noted that the angled ends 43 are provided with three spacedholes for registering With similar spaced holes 29 in the blade 2 asshown in Fig. 2 in one of theangular positions of the blade, the member26 being pinned to thev blade at the opposite side -through one. set lofthe holes 29 while the hole 30 at vthe junction of the portions 43 and24 takes a pin dit to secure it to the rear end ofthe member 2 6.

I desire it to be understood that this invention is not to 'be limitedto any particular construction 'or arrangement of parts except in sofaras such limitations are included in the claims.

What I claim as my invention is: 1. The combination with a vehicle, of ascraperv blade adapted rto work at the front of the vehicle, leverspivotally connected at their rear ends to the vehicle and having theirfront ends extending inwardly at an angle, means 'for connecting one ofsaid fronty ends along its length to the scraper blade, a connector forconnecting the front end of. the other lever to the other end of saidblade to provide an angular disposition of saidblade relative to itspath of travel, and means for independently raising and lowering saidlevers to adjust the angle of said blade 'in a vertical plane relativeto the surface over which it travels, and brace means for connecting theends of the blade with said levers.

2. The combination with a'vehicle, of a scraper blade adapted to work atthe front of the vehicle,

' levers 'pivptally connected at their rear ends ,to

the vehicle and having their front ends extendj ing inwardly atan angle,means for connecting said front ends to the central part of said blade,

braces connecting said levers to the ends of said blade, and means forindependently raising and lowering said levers to adjust the angle ofsaid blade in a vertical plane relative to the surface over which ittravels.

3.v The combination of `va vehicle having an operators seat at the rearportion, oi a scraper blade adapted to work at the front of the vehicle,a main framefor said vehicle, traction means for said vehicle includingframes, levers on opposite sides of the vvehicle pivotally connected attheir rear ends to said traction frames and having their front endsoperatively connected to said blade, ahoisting frame pivotally mountedon` each traction frame and operatively connected with the lever at thatside of the vehicle, an hydraulic cylinder connected with Aeach hoistingframe and pivotally connected with ,the main,

frame of the vehicle below the operators seat for independently raisingand lowering said hoisting frames to vary the angle of said blade-in avertical plane relative to the -surface over which it travels.

JOSEPH H. 'MEER

